It is necessary to study the dynamics of development and growth of individual organs as regulated by source-sink relations under different environments, across developmental stages and for different propagules. Their roles in determining tuber yield and size distribution is still unknown. However, such models do not well represent the development of apical and basal branches and their contributions to canopy leaf area varied at different stem density and temperature conditions. Various crop simulation models have been developed for tuber-grown potato crops to simulate total light interception, dry matter accumulation and partitioning at the population level. For example, plants grown from true potato seeds develop a single main stem and normally basal branches are only produced from above ground nodes, whereas more than one main stems can be developed in tuber-grown plants and several basal branches grow from below ground. While there are morphological differences existing in potato plants grown from different starting materials, especially in development of number of stems and types of branches. In addition, the novel hybrid potato technology makes it realistic to grow potato tubers from various starting materials, namely true potato seed, seedling tuber and seed tuber. Environmental factors like light and temperature, genotype and age determine the overall plant branching pattern. Jie Lu ( ), Tjeerd Jan Stomph ( Jochem Evers ( plant structure of potato is highly plastic. Types of research:Дata analysis (root traits as a function of nitrogen level), FSP modelling (implementation of relations between nitrogen and RSA simulations of maize growth and development) Contact:ДЇor further information on this thesis subject, please contact us. In this thesis, you mainly focus on image analysis, data analysis and modelling. Data from a hydroponic maize experiment is available. The aim of this project is to understand and quantify maize RSA characteristics in response to nitrogen, which can be further used to develop whole plant FSP model. This will enable quantifying the relevance of plasticity in RSA traits for maize performance. Therefore, further understanding of possible mechanisms driving plasticity in RSA based on available data, and implementing this in current FSP modelling efforts are necessary. Currently, our modelling of RSA changes in response to local nitrogen availability in maize still needs further development. This approach can be used to understand how changes in RSA traits in response to environmental factors affect plant growth. However, there are still gaps in our understanding on these plastic responses contribute to plant performance and productivity across environments.ДЇunctional structural plant (FSP) modelling is a plant simulation approach combining plant 3D structure and carbon & nitrogen sink-source relations. Such plasticity of RSA-related traits, such as the distance between side branches along a main branch, can help plant survive under resource-limited environments. Being able to adapt RSA in response to these environmental factors enables the plant to shape its RSA to optimize resource capture. Differences in RSA can affect plant nutrient capture which may have consequences for grain biomass accumulation. Root system architecture (RSA) is the results of the genetic make-up of the plant and environmental factors such as soil nitrogen and water, and changes as the plant develops.

Plant simulation game genetics growing